Including text in a shell script

Text can be included in the shell script by using a here
document, a special form of input redirection.

The << symbol is used to indicate that text should be
read up to a given mark. For example:

#!/bin/sh
# this script outputs the given text before it runs
cat << EOF
This shellscript is currently under development, please
report any problems to Danny (danny@cornflake.ed)
EOF
exec /usr/local/test/bin/test_version

The text is read from the script until a pattern is found
which matches that after the << symbol; execution then
proceeds as normal.